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Maintaining the incubator
5
(Optional) Remove the probe from the probe bracket. Although the bracket is designed to allow testing
while the probe is installed, you may find that it is easier to test with the probe removed.
Removing the temperature control probe from the probe bracket
a
Near the tip of the probe, unscrew and remove the fitting that secures the probe to the bracket
b
Gently slide the tip of the probe toward the bracket until the probe is free of the bracket.
6
Place all three containers near the incubator. Immerse the tip of the probe in the container of room-
temperature water. The temperature on the temperature controller should be within 1 °C of the chamber
setpoint, and there should be no active alarms.
7
Test the low temperature alarm. While constantly stirring the probe in the container (keeping the tip
immersed) and watching the temperature on the temperature controller, add the ice or chilled water a
little at a time so that the temperature decreases slowly (at a rate of about 0.5 °C per minute). When the
temperature reaches the low alarm setpoint, and the alarm delay period elapses, an alarm should sound
and -AL- and the red alarm light should flash.
8
Test the high temperature alarm. While constantly stirring the probe in the container (keeping the
tip immersed) and watching the temperature on the temperature controller, add the hot water a little
at a time so that the temperature increases slowly (at a rate of about 0.5 °C per minute). When the
temperature reaches the high alarm setpoint, and the alarm delay period elapses, an alarm should sound
and -AL- and the red alarm light should flash.
9
Return the probe to the probe bracket (if previously removed) and reinstall the probe bracket.
a
Gently slide the tip of the probe towards the outside of the bracket until the tip is about 2 inches (5
cm) from the end of the bracket.
b
Tighten the fitting to secure the probe to the bracket. About 1 inch (2.5 cm) of the probe should be
exposed.
c
Install the bracket in the chamber.
d
If you moved an agitator to access the probe bracket, move the agitator back to its original
position.
7.8.2
Testing temperature alarms manually on i.Series models
!
CAUTION:
The door must be left open during testing, which may affect the chamber
temperature. Before testing the alarms manually, take precautions to protect
items in the incubator from extended exposure to adverse temperatures per
regulations for your organization.
Due to space limitations, the method for testing PC100i models differs from the method used for other
models.
7.8.2.1
Testing temperature alarms manually on PC100i models
You must have the following to complete this procedure:
►
The tube for alarm checks. The tube, which is located in the chamber, is used to hold the water to be
used during the tests.
